Metal Stirling Engine Model Kit Color: 2 Material: Metal Package content: 1 x Stirling Engine Model Key benefits Visible thermodynamic motion: clear piston and flywheel movement make it easy to observe the Stirling cycle in action for handson learning. Speed control and demonstration: a knob adjusts air conduction to regulate engine speed, allowing controlled experiments and demonstrations. Educational and decorative: suitable as a classroom tool, hobby project, or polished desktop ornament that sparks interest in physics and engineering. How it works The engine produces power through a repeating cycle of cooling, compression, heat absorption, and expansion of the air inside the cylinder. Heat applied to the base causes temperature changes that drive the piston and flywheel. How to start 1. Pour two thirds of the alcohol lamp reservoir with 95% alcohol. 2. Ignite the alcohol and heat the base for about 30 seconds. 3. Gently turn the flywheel to begin motion; the engine will run as the cycle establishes. Features and performance Metal construction provides durability and a refined appearance suitable for display. Adjustable airflow via the knob lets you control rotational speed and observe different operating states. Simple ignition and startup procedure for repeated demonstrations. Practical uses Educational demonstrations in physics classrooms to illustrate thermodynamic cycles and mechanical motion. Handson STEM activity for hobbyists and families to build understanding of heat engines. Elegant desk ornament or unique gift for adults and children interested in science and mechanical models. Notes Intended as a model kit and demonstration device. Follow safe handling when using open flame and alcohol.